Stevie Wonder: A prominent figure in popular music during the latter half of the 20th century, Wonder has recorded more than thirty U.S. top ten hits and won twenty-two Grammy Awards[2] (the most ever won by a solo artist) as well as a Lifetime Achievement Award. He has also won an Academy Award for Best Song,[3] and been inducted into both the Rock and Roll[4] and Songwriters[5] halls of fame. He has also been awarded the Polar Music Prize.[6] American music magazine Rolling Stone named him the ninth greatest singer of all time.[7][8] In June 2009 he became the fourth artist to receive the Montreal Jazz Festival Spirit Award.[9]

He has ten U.S. number-one hits on the pop charts as well as 20 R&B number one hits, and album sales totaling more than 100 million units. Wonder has recorded several critically acclaimed albums and hit singles, and writes and produces songs for many of his label mates and outside artists as well. Wonder plays the piano, synthesizer, harmonica, congas, drums, bass guitar, bongos, organ, melodica, and clavinet. In his childhood, he was best known for his harmonica work, but today he is better known for his keyboard skills and vocal ability. Wonder is the first Motown artist and second African American musician to win an Academy Award for Best Original Song for his 1984 hit single "I Just Called to Say I Love You" from the movie The Woman in Red. According to britishhitsongwriters.com he is the eleventh most successful songwriter in U.K. chart history based on weeks that his compositions have spent on the chart.

(From Wikipedia)

Bruno Mars: Bruno Mars is one of the hottest pop sensations in recent years; not only because of his own hit songs, but also for the hit songs he's written for some of the most popular acts in music today. His musical style infuses modern pop with rock, hip hop, R&B, and reggae. His smooth voice and laid-back lyrics have made him a favorite among men and women alike. Bruno Mars is now putting his fame to good use, selling out 2011 tour dates worldwide for his Hooligans in Wondaland tour.

Born in Waikiki as Peter Gene Hernandez, Bruno Mars joined his family's band, The Love Notes, as soon as he was able. Performing around the island, the young Bruno Mars first gained recognition as an Elvis impersonator - to the extent that it even earned him a cameo in the Nicholas Cage and Sarah Jessica Parker movie, Honeymoon in Vegas. He moved to Los Angeles at the age of 17 to pursue a music career, adopting the moniker of Bruno Mars; the former because his father said he resembled wrestler Bruno Sammartino, the latter a tip of the cap to those girls who told him he was "out of this world."

During a brief stint at Motown Records, Mars met songwriter Philip Lawrence and engineer Ari Levine and the three formed a songwriting group called The Smeezingtons. Lawrence introduced Bruno Mars to Atlantic manager Aaron Bay-Schuck, who hired the Smeezingtons to write for the label. During this period of songwriting, Bruno Mars not only cultivated his personal sound but also co-wrote hit songs including "Right Round" by Flo Rida and "F*** You" by Cee-lo Green.

After releasing his EP, It's Better if You Don't Understand (which received fair reviews), Bruno Mars exploded on the music scene with his debut album, Doo-Wops & Hooligans. It featured the hit singles "Just the Way You Are" and "Grenade", which can still be heard playing on radios and in commercials. "Just the Way You Are" also earned him a Grammy for Best Male Pop Vocal Performance at the 2011 Grammy Awards.

Bruno Mars spent the better part of March, 2011 selling out concert dates across Asia, Europe, and Australia. Fans need not fear though, as there are plenty of tickets available for 2011 tour dates when Mars returns to the U.S. in May. His first stateside concert will be on May 1st at Bamboozle in New Jersey, and he'll make his way across the country before heading back to Europe, going as far as to stop at Coachella. Tickets for the Hooligans in Wondaland tour are still available, but if the hype in Europe and Asia is any indication, fans better buy soon.